Internal sounds, and final arrangement of parts.

With a focusing camera, a slot and rear card functioning as a background for sketch-cards, a sealed box, and functioning software to detect input, I was ready to trail the box on non-musician users, and found an immediate thing they did was look at the computer connected to it, and watching the card slide in to the view of the webcam.

At this point I was certain I needed to hide the computer, and decided to add an internal speaker to the housing, allowing for the output of the hidden computer to appear to come from the device itself.

Adding a golf-ball sized speaker, although sounding easy, proved to be another trial in its own right. I found it was supplied with a hard-wired cable around 3cm long.

I soldered a female 3.5mm jack to 1/4" jack cable, and ran it alongside the usb power cable to the computer.

My box had finally come to life, and I documented my first use of it, here: